Atm OCN 100 Exam 1 with all Correct & 100% Verified
Answers |Actual Complete Exam |Already Graded A+
What is the atmosphere? ✔Correct Answer--A mixture of gases that surrounds solid earth
-Largely contained within the first 50 km (30 miles) above the sold Earth (atmosphere is about
1/132 the thickness of the solid earth
Fluid ✔Correct Answer-Any substance that conforms to the shape of its container (ex.
toothpaste, glass, water, atmosphere)
What can we measure about the atmosphere? ✔Correct Answer-1. Temperature
2. Humidity
3. Wind Direction and speed
4. Chemical species
5. Pressure
Pressure ✔Correct Answer-Can be though of as a measure of how much the atmosphere
directly above you weights (this changes from day to day
Pressure = Force (Weight)/ Area
What was Earth's original atmosphere made of? ✔Correct Answer--Starting with the Big Bang
the universe was mostly composed of H and He
So we think it was
-He
-H
CH4 (Methane)
NH3 Ammonia
Why did the atmosphere change from its original state? ✔Correct Answer-1) H and He are so
light that they escaped the pull of Earth's gravity
2) Outgasing of water vapor and carbon dioxide and nitrogen from both extraterrestrial H2O
and breaking of the crust released gases
Earth's Second Stage Atmosphere ✔Correct Answer-CH4 (Methane)
NH3 (Ammonia)
Nitrogen (N2)
Carbon Dioxide (CO2)
Water
Argon (Ar)
Neon (Ne)
Krypton (Kr)
Many of these are noble/ inert gases so they do not react with anything
, What happened as Earth cooled over time? ✔Correct Answer--H2O vapor began to form
clouds and it began to rain a lot
- This formed oceans, lakes and rivers
-CO2 was gradually soaked up by these reservoirs and the atmosphere became rich in N2
What important occurrence happened 2-3 billion years ago? ✔Correct Answer--Primitive
plants evolved in the oceans
-Used photosynthesis to produce food
-Had products of O2 and Glucose (sugar)
Photosynthesis Equations ✔Correct Answer-Sunlight + 6CO2 + 6H20 --> 6 O2 + C6H12O6
What important gas came from the production of O2 by plants? ✔Correct Answer-OZONE
-Most ozone is about 30 miles about Earth's surface
-Forms a layer that protects us from deadly UV-rays
Ozone Reactions ✔Correct Answer-1) O3 + UV light --> O2 + O
**Note: UV light is what splits the O3
2) O2 + O --> O3
How did life respond to Oxygen and Ozone? ✔Correct Answer-1) Life colonizes dry land (and
is protected by ozone)
2) Oxygen breathing animals can be big!
What is the current atmospheric composition? ✔Correct Answer-N2 (75.5%)
O2 (23.1%)
Ar (1.3 %)
CO2 (0.40 %)
Ne (.0012 %)
Also He, Kr, H and O3 in smaller amounts
Also variable amounts of water vapor
Area ✔Correct Answer-length x width
3D objects can have surface area
Volume ✔Correct Answer-length x width x height
Force ✔Correct Answer-Can be thought of as weight or a push
Weight = Mass of an object x acceleration
Kinetic Energy ✔Correct Answer--Energy of motion
KE = 1/2 x mass x (velocity)^2 = 1/2mv^2
Answers |Actual Complete Exam |Already Graded A+
What is the atmosphere? ✔Correct Answer--A mixture of gases that surrounds solid earth
-Largely contained within the first 50 km (30 miles) above the sold Earth (atmosphere is about
1/132 the thickness of the solid earth
Fluid ✔Correct Answer-Any substance that conforms to the shape of its container (ex.
toothpaste, glass, water, atmosphere)
What can we measure about the atmosphere? ✔Correct Answer-1. Temperature
2. Humidity
3. Wind Direction and speed
4. Chemical species
5. Pressure
Pressure ✔Correct Answer-Can be though of as a measure of how much the atmosphere
directly above you weights (this changes from day to day
Pressure = Force (Weight)/ Area
What was Earth's original atmosphere made of? ✔Correct Answer--Starting with the Big Bang
the universe was mostly composed of H and He
So we think it was
-He
-H
CH4 (Methane)
NH3 Ammonia
Why did the atmosphere change from its original state? ✔Correct Answer-1) H and He are so
light that they escaped the pull of Earth's gravity
2) Outgasing of water vapor and carbon dioxide and nitrogen from both extraterrestrial H2O
and breaking of the crust released gases
Earth's Second Stage Atmosphere ✔Correct Answer-CH4 (Methane)
NH3 (Ammonia)
Nitrogen (N2)
Carbon Dioxide (CO2)
Water
Argon (Ar)
Neon (Ne)
Krypton (Kr)
Many of these are noble/ inert gases so they do not react with anything
, What happened as Earth cooled over time? ✔Correct Answer--H2O vapor began to form
clouds and it began to rain a lot
- This formed oceans, lakes and rivers
-CO2 was gradually soaked up by these reservoirs and the atmosphere became rich in N2
What important occurrence happened 2-3 billion years ago? ✔Correct Answer--Primitive
plants evolved in the oceans
-Used photosynthesis to produce food
-Had products of O2 and Glucose (sugar)
Photosynthesis Equations ✔Correct Answer-Sunlight + 6CO2 + 6H20 --> 6 O2 + C6H12O6
What important gas came from the production of O2 by plants? ✔Correct Answer-OZONE
-Most ozone is about 30 miles about Earth's surface
-Forms a layer that protects us from deadly UV-rays
Ozone Reactions ✔Correct Answer-1) O3 + UV light --> O2 + O
**Note: UV light is what splits the O3
2) O2 + O --> O3
How did life respond to Oxygen and Ozone? ✔Correct Answer-1) Life colonizes dry land (and
is protected by ozone)
2) Oxygen breathing animals can be big!
What is the current atmospheric composition? ✔Correct Answer-N2 (75.5%)
O2 (23.1%)
Ar (1.3 %)
CO2 (0.40 %)
Ne (.0012 %)
Also He, Kr, H and O3 in smaller amounts
Also variable amounts of water vapor
Area ✔Correct Answer-length x width
3D objects can have surface area
Volume ✔Correct Answer-length x width x height
Force ✔Correct Answer-Can be thought of as weight or a push
Weight = Mass of an object x acceleration
Kinetic Energy ✔Correct Answer--Energy of motion
KE = 1/2 x mass x (velocity)^2 = 1/2mv^2
